https://bugs.kde.org/show_bug.cgi?id=494522

--- Comment #20 from Jakob Petsovits <jpe...@petsovits.com> ---
(In reply to Devin Lin from comment #19)
> Indeed, running `ddcutil --display=1 setvcp 10 50` causes the display to
> crash after a fresh reboot of the monitor. Interestingly enough, it prints
> `Display not found`
> 
> It is inconsistent though in that if you change some settings (ex. setting
> the refresh rate) and then run the command, it doesn't crash anymore, but
> instead fails with: `Verification failed for feature 10`

In that case, it may pay off to discuss this behavior on the ddcutil issue
queue, at https://github.com/rockowitz/ddcutil/issues. I don't see an issue
specifically for the Samsung G5, however there is some discussion about
"Verification failed for feature 10" at
https://github.com/rockowitz/ddcutil/issues/323, seen for various different
monitors.

Let's not mark this RESOLVED UPSTREAM though until we know that ddcutil is
actually in a position to deliver any kind of fix for this. If it isn't, the
fix will have to be a checkbox to disable hardware brightness for this monitor
despite the hardware claiming that it can do it.

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